Level up or level down?

So the Chancellor is minded to introduce a tax on online sellers to "level the playing field" between them and high street shops.  OK I see the logic, but how about us, the shoppers, the consumers?  I tend to use Amazon because I can get stuff there cheaper than from the High Street, but if, as a result of such a tax, Amazon have to increase their prices, this may please the shopkeepers, but how does it benefit me? If you want to level the playing field, then rather than penalise the online sellers with a tax, how about giving the high street sellers some financial relief through business rates or VAT or the like.